Storage of soybean seeds: Packaging and modified atmosphere technology

Abstract

The characteristics of materials used in packages for seed storage may have a negative influence in the deterioration process, causing future problems during the period of storage and in emergence in the field. In this study, the objective was to evaluate the physiological quality of soybean seeds, stored in different packages with and without the addition of CO2 (modified atmosphere), for different periods of storage and in uncontrolled environmental conditions. In order to carry out the experiment, a completely randomized design was used in a split-plot scheme, with three types of packages (permeable, hermetic package inside the permeable package and hermetic package inside the permeable package with CO2 injection) in the main plot and six storage periods (zero, 45, 90, 135, 180 and 225 days) in the subplot, with four repetitions, totaling 72 experimental units. In hermetic packages multi-layer paper was used with or without CO2 injection, stored them for 225 days and performed an assessment at regular intervals of 45 days. At each period, the seeds were submitted to tests for moisture content, germination, seedling emergence, accelerated aging and electrical conductivity. The hermetic package, with and without CO2 injection, decreases the speed of deterioration of soybean seeds. The hermetic package allows a higher physiological quality of soybeans compared to the permeable package, with a storage period of up to 180 days under uncontrolled environmental conditions. The addition of CO2 inside the hermetic packages favors the maintenance of the physiological quality of soybean seeds in storage.

Effectiveness of hermetic containers in controlling paddy rice (Oryza sativa L.) storage insect pests

“…Therefore, when the grain is stored in polypropylene bags, fluctuation in moisture content is expected. In this study, the relative humidity in intergranular spaces in all hermetic containers remained stable during the storage period, while fluctuations were recorded in polypropylene bags, which corroborates with previous studies (Ng 'ang'a et al, 2016;Lane and Woloshuk, 2017;Capilheira et al, 2019). The polyethylene drum presented the lowest intergranular relative humidity thorough the experiment, which is somehow surprising.…”

Chickpea seed storage in different packagings, environments and periods

“…The decrease in the percentage of water content over the months of storage can be attributed to the hygroscopicity of the seed, that is, it has the property of absorbing or transferring water to the surrounding air (Oliveira et al, 2014;Costa et al, 2015). Humidity variations inside the packagings during storage cause variations in the water content of seeds during this period, since the seed has hygroscopic tissues (Capilheira et al, 2019).…”

An Endeavor of ‘Deep-underground Agriculture’: Deep-underground Storage in a Gold Mine Impacts the Germination of Canola (Brassica Napus L.) Seeds

“…VI is a comprehensive re ection of seedling biomass and germination speed, which is substantially affected by seed degradation. For seeds in envelope packaging, conditions including high temperature, an accumulation of microorganisms, and high RH resulting in increased seed moisture may reduce the ability of seeds to germinate (Capilheira et al, 2019;Jian et al, 2019;Modi and Bornman, 2004). Consequently, we found that VI declined most drastically over longer storage durations in deeper locations.…”

“…In turn, the factors that affect the GR also affected the GI. For instance, a high RH environment causes an increase in seed moisture, which aggravates seed degradation and inactivation (Capilheira et al, 2019), which in turn reduces GR.…”